<template>
    <div class="aaa">
        <el-calendar >
      <template #date-cell="{ data }">
        <p :class="data.isSelected ? 'is-selected' : ''"  >
          {{ data.day.split('-').slice(1).join('-') }}
          {{ data.isSelected ? '✔️' : '' }}
        </p>
      </template>
    </el-calendar>
    </div>
  </template>
  
  <style>
  .is-selected {
    color: #1989fa;
  }
  .aaa{
   height: 100px;
  }
.el-calendar__body{
  width: 550px;
  height: 300px;
  overflow: hidden;
}
  </style>
  